Gate of the pipe-line of a pneumatic conveyer

ABSTRACT

The gate comprises a damper /1/ overlapping the cross-section of a pipe-line /2/ and kinematically connected with a movable link /3/ of a drive /4/ turning it about an axle /5/ disposed on the pipe-line /2/, and a driven pin trip /12/ entering a hole made in the pipe-line and meant to hold the damper /1/ in the closed position. Secured on the damper /1/ is a bracket /8/, and in the kinematic chain connecting the damper /1/ with the drive /4/ there is an angular lever /9/ which is mounted so that it can turn through a limited angle and whose axle /10/ of turning is secured on the bracket /8/ parallelly to the axle /5/ of turning of the damper /1/. One arm of the angular lever /9/ is connected to the movable link /3/ of the drive /4/, and the damper /1/ has guides /13/ made thereon and accommodating a pin trip /12/ which is kinematically connected with the other arm of the angular lever /9/.

TECHNICAL FIELD

The present invention relates to pneumatic conveyers and, moreparticularly, to the gate of its pipeline.

It is most expedient to mount the gate made in accordance with thepresent invention as a terminal gate in pipe-lines of a pneumaticconveyer used for transporting books in libraries.

It is possible to use the gate of the present invention in pipe-lines ofpneumatic conveyers, having a relatively small cross-section.

BACKGROUND OF THE INVENTION

Known is a gate of the pipe-line of a pneumatic conveyer, comprising adamper overlapping the pipe-line cross-section and kinematically coupledwith the drive movable link to turn it around an axle arranged on thepipe-line, and a pin trip kinematically coupled with an autonomousdrive, said pin trip entering a hole made in the pipe-line close towhere the damper is disposed to hold the latter in the closed state.Another pin trip coupled with its own drive serves to hold the damper inthe open position.

In the afore-described gate of a pipe-line use is made of pin trips tohold the damper in the closed and open positions, each of said pin tripshaving its own drive. To ensure an accurate and reliable operation ofthe gate, use is made of an automatic control system synchronizingoperation of all the drives, which complicates manufacture and operationof this gate.

DISCLOSURE OF THE INVENTION

The invention resides in provision of such a gate of the pipe-line of apneumatic conveyer, in which the drive of the pin trip would be made sothat it would allow to considerably simplify both manufacture of thepipe-line gate and its operation.

This task is accomplished by that in a gate of the pipe-line of apneumatic conveyer, comprising a damper overlapping the pipe-linecross-section and kinematically coupled with a drive movable link toturn it about an axle disposed on the pipe-line, and a driven pin tripentering a hole made in the pipe-line to hold the damper in the closedposition, according to the invention, the damper has a bracket securedthereon and in the kinematic chain coupling the damper with the drivethere is an angular lever which is mounted so that it can turn through alimited angle, whose axle of turning is secured on the bracket parallelto the axle of turning of the damper, and whose one arm is connected tothe drive movable link, and the damper has guides that are made thereonand that accomodate a pin trip which is kinematically coupled with theother arm of the angular lever.

The gate of the pipe-line of the pneumatic conveyer, built in accordancewith the present invention, is simple in manufacture and provides for aturn of the damper and displacement of the pin trip with the aid of onlyone drive, which eliminates the necessity of having an automatic controlsystem and, consequently, makes the gate simple in operation.

BRIEF DESCRIPTION OF THE DRAWINGS

The following description of a specific embodiment of the presentinvention is given with reference to the accompanying drawings, inwhich:

FIG. 1 shows a gate of the pipe-line, according to the invention, a sideview with a partial extraction, the damper is overlapping the pipe-line;

FIG. 2 is ditto, the damper is turned to open the pipe-line;

FIG. 3 is a view along the arrow "A" in FIG. 1.

MODE FOR CARRYING OUT THE INVENTION

A gate of the pipe-line of a pneumatic conveyer comprises a damper 1(FIGS. 1, 2) which overlaps the cross-section of a pipe-line 2 and iskinematically coupled with the movable link--a rod 3 of a power cylinder4 serving as a drive for turning it relative to an axle 5. The axle 5 ismounted in a bracket 6 which is rigidly secured to the pipe-line 2. Thedamper 1 has ribs 7 which are rigidly connected thereto and by means ofwhich it is mounted on the axle 5 so that it can turn relative to thelatter. Rigidly secured between the ribs 7 of the damper 1 is a bracket8. The kinematic chain connecting the gate I with the rod 3 of the powercylinder 4 comprises an angular lever 9 whose turning axle 10 is securedon the bracket 8 parallel to the axle 5 of turning of the damper 1. Onearm of the lever 9 is coupled with the rod 3 of the power cylinder 4,and the other arm of the lever 9 is coupled through a tie 11 with a pintrip 12.

Secured to the outer side of the damper 1 are two guides 13 spaced fromeach other along the height and used to mount the pin trip 12. Rigidlysecured to the pipe-line is a plate 14 having a hole 15 accommodatingthe end portion of the pin trip 12 when the damper 1 is in the closedposition.

Disposed on the pin trip 12 between the guides 13 is a spring 16 whichis connected by its one end portion with the pin trip 12. Made in thepin trip 12 in the area of its connection with the tie 11 is alongitudinal slot 17 used to accommodate an axle 18 connecting the trip12 with the tie 11.

Secured on the bracket 8 are stops 19, 20 which limit the turn of theangular lever 9 in one and opposite directions, respectively.

From the side facing the pipe-line the damper has a seal ring 21.

The gate of the pipe-line of the pneumatic conveyer functions asfollows.

To bring the damper 1 from the closed position into the open one, thepower cylinder 4 is actuated, as a result of which the rod 3 moves fromthe extreme right position (according to the drawing) to the left. Theangular lever 9 first turns about its axle 10 to the left(counter-clockwise) until it thrusts against the stop 19. The tie 11imparts a vertical upward movement to the pin trip 12 in the guides 13.The spring 16 is compressed and the pin trip 12 leaves the hole 15, as aresult of which the damper 1 is freed. Then, during the further movementof the rod 3 of the power cylinder 4 to the left, there takes place amutual turn of the angular lever 9, the bracket 8 and the damper 1 aboutthe axle 5 until the cross-section of the pipe-line 2 is completelyopened, thereby providing for a free passage of containers (not shown).

The damper 1 can be fixed in its open position with the aid of anyconventional means which is suitable for the purpose and which is to bemounted on the power cylinder 4.

Closing of the damper 1 and its fixation in the closed position are donein the reverse order, with the rod 3 of the power cylinder 4 moving fromthe extreme left position to the extreme right position, whereby thedamper 1 first turns together with the angular lever 9 about the axle 5until the damper 1 overlaps the cross-section of the pipe-line 2.

Then, during the further movement of the rod 3 to the right there takesplace a turn of the angular lever 9 relative to the axle 10 to the right(clockwise) until it thrusts against the stop 20, as a result the damper1 is further pushed and the seal ring 21 is deformed, thereby providingfor hermetic sealing of the pipe-line 2.

The pin trip 9 is disposed strictly above the hole 15 in the plate 14and enters it under the action of the spring 16. Thus, the damper 1 isfixed in the closed and hermetically sealed position.

INDUSTRIAL APLICABILITY

It is most expedient to mount the gate made in accordance with thepresent invention as a terminal gate in pipe-lines of a pneumaticconveyer used for transporting books in libraries.

It is possible to use the gate of the present invention in pipe-lines ofpneumatic conveyers, having relatively small cross-section.

I claim:
 1. A gate assembly for a pipeline of a pneumatic conveyorcomprising:a damper pivotally mounted to said pipeline about a damperaxle for movement between a closed position so as to close an opening insaid pipeline and an open position so as to open said opening; a driveassembly including a movable link for moving said damper between saidopen and closed positions; at least one guide secured to said damper; aplate having a hole and secured to the pipeline; a driven pin tripsecured to said damper by said at least one guide, and positioned withinsaid hole of said plate when said damper is in the closed position tolock said damper thereat; a bracket secured to said pipeline; an angularlever pivotally mounted to said bracket parallel to said damper axle ina limited angular range about a lever axle, and pivotally connected tosaid movable link and said driven pin trip.
 2. A gate assembly accordingto claim 1; wherein said bracket includes first and second stops forlimiting the range of pivotal motion of said damper about said damperaxle.
 3. A gate assembly according to claim 1; further comprising atleast one rib fixedly secured to said damper and pivotally mounted onsaid pipeline about said damper axle to pivotally mount said damperthereat.
 4. A gate assembly for a pipeline of a pneumatic conveyor,comprising:damper means pivotally mounted to said pipeline about adamper axle for movement between a closed position so as to close anopening in said pipeline and an open position so as to open saidopening; drive means including a movable link for moving said dampermeans between said open and closed positions; locking plate meanssecured to the pipeline; driven pin trip means fixedly secured to saiddamper means, and lockingly positioned with said locking plate meanswhen said damper means is in the closed position to lock said dampermeans thereat; bracket means secured to said pipeline; angular levermeans pivotally mounted to said bracket means about a lever axleparallel to said damper axle in a limited angular range, and pivotallyconnected to said movable link and said driven pin trip means.